package templates;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        for (int i = 1; i <= n; i++) {
            String op = scanner.next(), ad = scanner.next();
            System.out.println(op + ad);

        }
    }
}
